toolchain-funcs.eclass: Upgrade to upstream version

Upgrade toolchain-funcs.eclass to latest upstream version.

BUG=chromium:916320
TEST=CQ

Cq-Depend: chromium:2276453
Change-Id: I120b7952c9f91c111f58542525edeb12f02c02aa
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2276454
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Manoj Gupta <manojgupta@chromium.org>
Tested-by: Manoj Gupta <manojgupta@chromium.org>
1 file changed